8267153: Problemlist jdk/jfr/event/gc/collection/TestG1ParallelPhases.java to remove the noise from CI

Reviewed-by: dcubed, jiefu

Author: Thomas Schatzl

test/jdk/ProblemList.txt

@@ -836,6 +836,7 @@ jdk/jfr/event/compiler/TestCodeSweeper.java                     8225209    gener
 jdk/jfr/event/os/TestThreadContextSwitches.java                 8247776 windows-all
 jdk/jfr/startupargs/TestStartName.java                          8214685 windows-x64
 jdk/jfr/startupargs/TestStartDuration.java                      8214685 windows-x64
+jdk/jfr/event/gc/collection/TestG1ParallelPhases.java           8267133 generic-all
 
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